Attention!：All stories in this work is localized with INKR Studio.

With the country's finest magician as his elder sister and an elder brother equally skilled in martial arts, Ferris, second son of Viscount Clouren, uses his siblings as cover to become independent at 15.
Reincarnated with the supreme talents of both siblings, Ferris tries to live a peaceful, inconspicuous life pursuing his hobby as a magic core craftsman, but his doting siblings won't let him be!
His sister keeps piling work on him, unable to bear the thought of her younger brother's talent going unnoticed.
Overwhelmed by his siblings' pestering, he finds himself juggling his job as a craftsman while secretly keeping peace in the territory.
As time goes on, his name gradually spreads across the world.
"My dearest siblings, could you please stop interfering with my magic core crafting?"
This story follows the secret maneuvers of an invincible yet oblivious reincarnated boy who simply wants to live a laid-back life.